One possible plotline could be Peter dealing with the long - term aftermath of Tony Stark's death. He might struggle with living up to Tony's legacy while also trying to find his own place in the post - Endgame world. Another could be Peter exploring new relationships, whether it's with his friends at school who have also been affected by the events, or new superhero allies.
In some 'Peter Parker after Endgame' fanfiction, there could be a plotline where Peter tries to bring back some of the heroes who were lost in Endgame. He might embark on a dangerous quest, using his intelligence and his spider - powers. Along the way, he could meet other characters from different parts of the Marvel universe who either help or hinder his mission. And his relationships with his aunt May and Happy Hogan could also be explored in new and deeper ways as he deals with the post - Endgame situation.
One possible plotline could be that Peter is kidnapped by a group of villains who want to use his spider - abilities for their own evil plans. They might try to force him to create some sort of super - weapon using his web - shooting and super - strength. Another plotline could be that a mad scientist kidnaps Peter to study his unique DNA and how it gives him his powers. Maybe the scientist wants to replicate the powers for himself or sell the formula to the highest bidder.
One interesting plotline could be Peter Parker coming back to find that his city has changed a great deal in his absence. Maybe new villains have emerged and he has to quickly adapt to the new threats. Another could be his relationships with his friends and family being strained after his return, and he has to work to repair them.
One possible scenario could be that Peter sacrifices himself to save others during a crucial battle in the Endgame - like situation in the fanfiction. Maybe he uses his powers to hold off a powerful enemy while the rest of the heroes complete a vital task.
One interesting plotline could be Peter Parker struggling to control the Anti - Venom symbiote. Maybe it has a mind of its own and tries to take over Peter's actions at times. For example, it might lash out at his enemies more brutally than he intends.
One interesting plotline could be Peter struggling to fit in with the Avengers' high - tech and super - powered world while still maintaining his normal life as a high school student. For example, he might have trouble keeping up with the Avengers' training schedules while also studying for exams.
One possible plotline could be Peter Parker dealing with the unexpected side effects of getting high while still trying to keep his identity as Spider - Man a secret. Maybe he has to fight villains while his senses are all out of whack due to the substances. Another could be his friends noticing his strange behavior and trying to figure out what's wrong with him.
It would deeply affect Tony Stark. Tony has been like a mentor to Peter, so his death would be a huge blow. Tony might blame himself for not being able to protect Peter.
Peter Parker might develop by becoming more of a leader. In the fanfiction, he could step up and take charge in certain situations, guiding the other heroes. This would be a big change from his more inexperienced self in the movies.
Well, one possibility is that Peter could use time travel to prevent certain events that led to his own death in Infinity War. He might go back and warn the Avengers earlier about Thanos' plan, which could change the whole course of the battle.
One potential new character could be a mysterious figure from another dimension who appears in Peter's world after Endgame. This character could have unique powers and a complex backstory that ties into the post - Endgame chaos. Also, there might be a new journalist character who is trying to expose Peter's identity, adding a whole new layer of drama to his life. There could also be a new mentor - like figure for Peter, someone who has a different perspective on being a hero compared to Tony Stark.